The round () function in Python

Continuing with the topic of built-in functions in Python, this article will introduce you to the round () function with syntax, usage, and specific examples. Invites you to read the track.

The round () function in Python rounds a given number, returning that number as a floating point number, with the specified number of digits after the comma. The number after the default comma is 0, meaning the function will return the nearest integer.

Syntax round () function in Python:

 round(number[, ndigits])

Parameters of the round () function

The round () function has 2 parameters:

number : The number you want to round.
ndigits : Number of digits after comma that you want to use to round numbers. The default is 0.

Return value from round ()

Without ndigits , the function will return the nearest integer.
If two parameters are supplied, the function returns number with the decimal ndigits after the comma.

Example 1: how does round () work?

For example, only pass the first parameter:

 # không có tham số ndigits print(round(10)) print(round(10.7)) print(round(5.5)) print(round(5.4)) print(round(6.8)) print(round(0.1)) print(round(0.7))

When you run the program, the output will be:

 10 11 6 5 7 0 1

Example 2: Round a number to the given ndigits position

Example of passing both parameters:

 print(round(2.665, 2)) print(round(50.25556, 2)) print(round(100.000056, 3)) print(round(80.23456, 2)) print(round(122.145,5))

When you run the program, the output will be:

 2.67 50.26 100.0 80.23 122.145

The round () function only has a few notes like that. Remember to practice regularly with Python exercises.

See more:

The float () function in Python
How to install Python on Windows, macOS, Linux
Regular Expression (RegEx) in Python
The sum () function in Python

Micah Soto

Update 30 December 2019

You should read it

May be interested

The function set () in Python
in this article, tipsmake.com will learn with you about set (), syntax, parameters and specific examples. invites you to read the track.
Help () function in Python
the built-in help () function in python is used to display documents and invoke the help system of modules, functions, classes, keywords ...
Sum () function in Python
the built-in function sum () in python returns the sum of all numbers in iterable.
The slice () function in Python
the slice () function in python returns a slice object that helps you determine how to cut an existing string.
The chr () function in Python
in python, the chr () function returns a character (a string) from an integer that represents the unicode of the returned character.
The iter () function in Python
continuing with the topic of python's built-in functions, the article will introduce you to the iter () function with the syntax, usage as well as specific examples. invites you to read the track.
The pow () function in Python
the pow () function built into python returns the value of x with the power of y (xy). if there is a third parameter, the function returns x to the power y, the module z.
The reversed () function in Python
the reversed () function is one of the built-in functions in python, used to reverse the original string returning the iterator.
Built-in Python functions
in the previous article, you learned that python has a basic function type, one is a built-in function, two are user-defined functions. today, we will learn about a list of python's built-in functions.
Exec () function in Python
the exec () function used to execute python programs dynamically can be string or object code. how does exec () function syntax, what parameters do it have, and how is it used? invites you to read the track.